Is there a difference between MS and BBA courses, and which one is better for me?

Yes, there is a significant difference between a Master of Science (MS) and a Bachelor of Business Administration (BBA).

An MS is a postgraduate degree that provides advanced, specialized knowledge in a specific field, typically for those who already hold an undergraduate degree. A BBA is an undergraduate degree focused on foundational business concepts and is intended for students just starting their academic journey in business.

Since you already have a master's-level education, pursuing an MS in a business-related field is the logical next step if you want to deepen your expertise or specialize further. A BBA would not be suitable after completing higher education, as it is designed for those at the beginning of their studies.